Knife-head holder



1929. e. VANDERHOOF 1 ,739,336

- KNIFE HEAD HOLDER Filed July 5. 1928 V ////A I INVENT ,3 1 V nck'rhoofA TTORNE Y.

l atented Dec. 10, 1929 UNITED STATES GEORGE E. VANDERHOOF, OF KARVAL,COLORADO KNIFE-HEAD HOLDER Application filed. July 5, 1928.

The object of the invention is to provide a device for application tothe knife head of a sickle on a mower, grain binder, header, or othermachine provided with a sickle, so as to effectively prevent the knifehead leaving its place between the knife head guide and knife guard inthe event of wear which very quickly follows the use of such a machinewhen used on sandy ground; and to provide a simple device which may bereadily applied to the mowing or cutting elements of a conventionalmachine without any modification of the structure thereof, the devicebeing of simple form and therefore susceptible of cheap manufacture andlow marketing cost.

lVith this object in view, the invention consists in a construction andcombination of parts of which a preferred embodiment is illustrated inthe accompanying drawings wherein Figure 1 is aplan view of that portionof a mowing machine with which the invention is directly associated.

* igure 2 is a sectional view on the plane innicated by the line 22 ofFigure 1.

Figure 3 is a side elevational view of the knife edge.

The invention consists of a yoke 1 disposed in spanning relation to theknife head 2 with which the pitman 3 operating the knife head ispivotally connected, the knife head being carried on the sickle l forthe operation of the latter when the pitman is reciprocated.

The yoke is of arcuate form and made preferably of fiat metal, thecurved portion 5 being disposed at right angles to the terminal portions6 and 7 The yoke is secured in place by the bolts 8, 9 and 10, thesebolts serving not only to hold the yoke but to hold the knife head guide11 and knife guard 12 in place, replacing the bolts originally used forthis purpose. The under edge of the curved portion of the yoke serves toprevent the knife head raising and thus leaving its position between theknife head guide and knife guard and thus prevents many broken sickleswith the consequent delay in making repairs. Being of such extremelysimple form, it may be manufactured at small expense and applied withpractically no difficulty. The guard be- Serial No. 290,453.

ing disposed so that the curved portion is directed away from the end ofthe pitman, interference between the latter and the guard is prevented.

The invention having been described, what is claimed as new and usefulis:

In combination with a sickle element of an agricultural machine, thesame having a knife head and knife head guide and knife guard betweenwhich the knife head moves, a guard yoke having a curved or arcuateportion spanning the knife head and terminals disposed respectively uponthe knife head guide and knife guard, and bolts extending through theterminals of the guard yoke and through the knife head guide and knifeguard respectively and retaining said parts in position, said guard yokebeing formed of flat metal twisted to dispose the curved or arcuateportion at substantially right angles to the terminal portions.

In test mony whereof he aflixes his signature.

GEORGE E. VANDERHOOF.

